A ball falls from the top of a building, through the air (air resistance is present), to the ground below. How does the kinetic energy (KE) just before striking the ground compare to the potential energy (PE) at the top of the building?

a. K is equal to U.
b. K is greater than U.
c. K is less than U.
d. It is impossible to tell

The metric unit of electrical power is the watt volt ampere ohm

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative